That is a lot of trucks. I tend to be just the opposite. I tend to keep hold of my vehicles but I can remember going through quite a few different vehicles when I was younger. Being 6'7" I certainly know your frustration in finding a vehicle that is comfortable. It seems odd to say that you bought a vehicle because it fits you (most folks would think you would be talking about fitting in with your tastes but we look for a vehicle that we can fit in) but that is a big deciding factor for us.
I currently own an 06 Tacoma and I run the seat all the way back and lean the seat back quite a bit to be able to fit under the roof. Most of my height is in torso so I need a high roof line. I also have a 2011 Honda Pilot that works pretty well. On long trips I have to make a stop and get out and stretch every couple of hours but a fellow should get out of their vehicle and loosen up anyhow, so I don't mind that.
My real love is my 71 F 250. It has a higher roof than the later models and is well built and is certainly proving durable. I am building my own camper in the back of the shell. Something simple that I can sleep comfortably in. Most folks can sleep from side to side and most campers are made with that in mind. I need a bet that is at least 7' long and I don't want anything wider than the pickup. Thoughts that I am sure that you have considered.
well good luck with your new project and I certainly agree with the one post that brought up being paid for. I think being paid for and older is better than new, fancy and in debt. take your time and you will get there.
Mikey
Here is a shot of Rueben, my 71
Here is a shot of Catsup, my Tacoma
P.S. I am curious about what vehicles that you find comfortable. I too have moved my share of seats back.